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MAN Diesel & Turbo SE has announced that it has launched an investigation into possible irregularities during the handover of 4-stroke marine diesel engines produced by the firm.

The management board of MAN SE has launched the investigation, which is to be carried out by the compliance department of MAN SE together with external consultants. The investigation is still ongoing.

According to interim result of the investigation MAN SE said it was possible to externally influence the fuel consumption values for 4-stroke marine diesel engines obtained on test stands at MAN Diesel & Turbo SE and to display results that deviated from those actually measured.

"The extent to which this influence possibility has been made use of in the context of handover to customers and the potential financial consequences for the MAN Group will be examined in the course of further investigations. MAN SE will continue to investigate the matter and will contact the customers concerned," MAN SE said.

MAN SE commented that it had informed the public prosecutor's office Munich I of the ongoing investigation and will co-operate closely with it in establishing the facts.

The area of 4-stroke marine diesel engines, which forms part of the Engines & Marine Systems division of MAN Diesel & Turbo SE, generated sales of some 371 million Euros in the financial year 2010.

MAN SE says it has immediately implemented all necessary measures to comprehensively investigate the matter, adding that the revelation and the strict handling of the issue is a direct consequence of the compliance system implemented at MAN.

"Unfair business practices as well as violations of laws or other rules are not tolerated by MAN," MAN SE said.